https://finance.yahoo.com/news/ibm-seeks-167-million-groupon-013321745.html

"Most big companies have taken licenses to these patents," Desmarais said. "Groupon has not. The new kid on the block refuses to take responsibility for using these inventions."

Groupon lawyer J. David Hadden argued that IBM was overreading the scope of its patents and claiming ownership of building blocks of the internet.